Aircraft Operations. Volume II - Construction of Visual and Instrument ...

Foreword (xix)
6. PROMULGATION OF INFORMATION
The establishment and withdrawal of and changes to facilities, services and procedures affecting aircraft operations
provided in accordance with the procedures specified in this document should be notified and take effect in accordance
with the provisions of Annex 15.
7. UNITS OF MEASUREMENT
Units of measurement are given in accordance with the provisions contained in Annex 5. In those cases where the use
of an alternative non-SI unit is permitted, the non-SI unit is shown in brackets immediately following the primary SI
unit. In all cases the value of the non-SI unit is considered to be operationally equivalent to the primary SI unit in the
context in which it is applied. Unless otherwise indicated, the allowable tolerance (accuracy) is indicated by the number
of significant figures given and, in this regard, it is to be understood in this document that all zero digits, either to the
right or left of the decimal marker, are significant figures.
23/11/06